G2s are trash and require too much upgrade to make them a good base for a weapon mounted light. I have a few of them on a gun, and they suck... bad switches, etc.
Here's my home Defense gun light. Cree LED in a solarforce host/body. And a switch that won't turn on if I throw the gun in a case of the back of the truck or whatever.
Don't mix your house/utility lights and weapon lights. Get the gun light mounted and leave it on there. Otherwise it won't be there when you need it the most.
